Method of automatic adjustment of self-contained radio-clock by means of time mark
US4440501A · kind A · utility
18Cited by
7References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jun 11, 1981 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Jun 11, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R40/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A time measuring method is combined with an automatic rate correction process in a digital or quasianalog clock; a clock rate deviation is repeatedly measured, in a predetermined lock-in-range, derived from the clock oscillator frequency, by means of a time mark received from a transmitter; the deviation data are stored and used for correcting the clock rate and the oscillator frequency whereby the stored data are maintained until the arrival of the next time mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.